This is flawed. A car usually costs you several hundred dollars/euros per month/whether you use it or not/The gas cost of a car is way less than public transport. So you end up spending less using a car.

In Australia, about 80% of people on the roads drive 10-20km/h UNDER the speed limit. They also block all the lanes and leave huge gaps in front at traffic lights - gaps where I could drive another small car into.Police don't do anything about blockers, one even drove 10min right behind a car going 30km/h in a 60km/h one lane street. Then he put on his sirens. I thought he was going to do something, but as soon as the car pulled over he just drove on!

Given that usually missles you want to destroy are aimed AT you and not flying OVERHEAD, esp when just 2km away, I wonder how useful this system is.Maybe we can ask our enemies to put them next to their launching pads?